[R] Combining several mappings in ggplot2

[Tribo Laboy]

Hi Thierry

Thanks for replying. I tried your code, but it spit an error on me:

> Orange2 <- data.frame(Tree = as.factor(Tree_v), age = age_v,
+ circumference = circumference_v, Lines =
factor(as.numeric(Orange2$Tree) + %% 4))
Error: unexpected SPECIAL in:
"Orange2 <- data.frame(Tree = as.factor(Tree_v), age = age_v,
circumference = circumference_v, Lines = factor(as.numeric(Orange2$Tree) + %%"

Am I typing it correctly? What does the %% 4 or %%5 mean by the way?

Regards,

TL


On Wed, Mar 26, 2008 at 11:26 AM, ONKELINX, Thierry
<Thierry.ONKELINX at inbo.be> wrote:
> Tribo,
>
>  It looks like geom_line() accepts only 4 linetypes and you asked for 5.
>
>  library(ggplot2)
>
> Tree_v <- rep(c(1:5),each = 5)
>  age_v <- rep(seq(1,25, by = 5),5) + 10*runif(25)
>  circumference_v <- rep(seq(21,45, by = 5), 5)*Tree_v + 25*runif(25)
>
>  #This will work
>
> Orange2 <- data.frame(Tree = as.factor(Tree_v), age = age_v,
>  circumference = circumference_v, Lines = factor(as.numeric(Orange2$Tree)
>  %% 4))
>  ggplot(data = Orange2, aes(x = age, y = circumference, color = Tree,
>  linetype = Lines)) + geom_line()
>
>  #This won't
>
> Orange2 <- data.frame(Tree = as.factor(Tree_v), age = age_v,
>  circumference = circumference_v, Lines = factor(as.numeric(Orange2$Tree)
>  %% 5))
>
> ggplot(data = Orange2, aes(x = age, y = circumference, color = Tree,
>  linetype = Lines)) + geom_line()
>
>  HTH,
>
>  Thierry
>
>  ------------------------------------------------------------------------
>  ----
>  ir. Thierry Onkelinx
>  Instituut voor natuur- en bosonderzoek / Research Institute for Nature
>  and Forest
>  Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
>  methodology and quality assurance
>  Gaverstraat 4
>  9500 Geraardsbergen
>  Belgium
>  tel. + 32 54/436 185
>  Thierry.Onkelinx at inbo.be
>  www.inbo.be
>
>  To call in the statistician after the experiment is done may be no more
>  than asking him to perform a post-mortem examination: he may be able to
>  say what the experiment died of.
>  ~ Sir Ronald Aylmer Fisher
>
>  The plural of anecdote is not data.
>  ~ Roger Brinner
>
>  The combination of some data and an aching desire for an answer does not
>  ensure that a reasonable answer can be extracted from a given body of
>  data.
>  ~ John Tukey
>
>  -----Oorspronkelijk bericht-----
>  Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
>  Namens Tribo Laboy
>  Verzonden: woensdag 26 maart 2008 12:01
>  Aan: hadley wickham
>  CC: r-help at r-project.org
>  Onderwerp: Re: [R] Combining several mappings in ggplot2
>
>
>
>  Apologies! I though that the Orange dataset comes with R, but it is in
>  fact in the package "datasets".
>
>  So here's another "Orange2" dataset for the example:
>
>  Tree_v = rep(c(1:5),each = 5)
>  age_v = rep(seq(1,25, by = 5),5) + 10*runif(25)
>  circumference_v <- rep(seq(21,45, by = 5), 5)*Tree_v + 25*runif(25)
>  Orange2 <- data.frame(Tree = as.factor(Tree_v), age = age_v,
>  circumference = circumference_v)
>
>
>  This works fine:
>
>  ggplot(data = Orange2, aes(x = age, y = circumference, color = Tree))
>  + geom_line()
>
>  These generate errors (included):
>
>  > ggplot(data = Orange2, aes(x = age, y = circumference, color = Tree,
>  linetype = Tree)) + geom_line()
>  Error in get("check_domain", env = ., inherits = TRUE)(., ...) :
>   Too many values in domain (5 > 4)
>
>
>  > ggplot(data = Orange2, aes(x = age, y = circumference, color = Tree))
>  + geom_line() + scale_linetype_manual(value = c(1:5))
>  Error in unit(values, units, data = data) :
>   'x' and 'units' must have length > 0
>
>
>  What am I doing wrong?
>
>
>  Regards,
>
>  TL
>
>
>
>  On Wed, Mar 26, 2008 at 2:08 AM, hadley wickham <h.wickham at gmail.com>
>  wrote:
>  > On Tue, Mar 25, 2008 at 11:48 AM, Tribo Laboy <tribolaboy at gmail.com>
>  wrote:
>  >  > Hello,
>  >  >
>  >  >  I want to be able to make a plot that has several series with
>  >  >  different color and linetype.
>  >  >  Online documentation suggest that this is possible, but I haven't
>  found how:
>  >  >
>  >  >  "We can also create redundant mappings, mapping the same variable
>  to
>  >  >  multiple aesthetics. This is most useful when producing a graphic
>  for
>  >  >  both colour and black and white display."
>  >  >
>  >  >  Here's what I have to get the color
>  >  >  ggplot(data = Orange, aes(x = age, y = circumference, color =
>  Tree)) +
>  >  >  geom_line()
>  >  >
>  >  >  if i try this I get an error:
>  >  >  ggplot(data = Orange, aes(x = age, y = circumference, color =
>  Tree,
>  >  >  linetype = Tree)) + geom_line()
>  >
>  >  Please provide a reproducible example (or at least describe the
>  >  error!), otherwise we have no way to help you.
>  >
>  >  Hadley
>  >
>  >
>  >  --
>  >  http://had.co.nz/
>  >
>
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